The invention discloses a Low-carbon magnesia carbon
brick with magnesia impregnated by
tar and
asphalt as an aggregate and a preparation method thereof. The low-carbon magnesia carbon
brick comprisesthe following components by weight: 45 to 55% of a magnesia aggregate impregnated by
tar and
asphalt, 35 to 45% of unimpregnated magnesia, 3 to 5% of
graphite, 0.5 to 1.5% of high-temperature
asphalt, 2 to 3% of an
antioxidant and 2.5 to 3.5% of a binder. The preparation method comprises the following steps: 1) carrying out impregnating so as to obtain the magnesia aggregate impregnated by
tar and asphalt; 2) weighing the components with the desired weight; 3) premixing unimpregnated magnesia
powder, high-temperature asphalt and the
antioxidant to obtain mixed
powder; 4) subjecting the magnesia aggregate and the unimpregnated magnesia
powder to
dry mixing in a mixing and
grinding machine, then successively adding the binder,
graphite and the mixed powder, and carrying out mixing and
grinding to form a mixture; and 5) carrying out briquetting, molding and heat treatment so as to obtain the low-carbon magnesia carbon
brick with the magnesia impregnated by tar and asphalt as the aggregate. The low-carbon magnesia carbon brick has the advantages of good
thermal shock resistance, good resistance to
slag erosion and great high-temperature strength, and is significantly prolonged in service life.